E15 Expansion Could Reshape Fuel and Crop Markets
FAPRI-MU analysis shows modest consumer fuel savings but shifting pressure across ethanol, biodiesel, and agricultural commodities
A new analysis (link) from the Food and Agricultural Policy Research Institute (FAPRI-MU) at the University of Missouri examines how expanded use of E15 gasoline — particularly through year-round blending — could affect U.S. fuel markets, biofuel compliance costs, and agricultural commodities over the next several years. The report, authored by Seth Meyer, Jarrett Whistance, and Wyatt Thompson, uses the FAPRI-MU stochastic modeling framework to simulate market outcomes under greater ethanol inclusion.
Core finding: easier Renewable Fuel Standard compliance
According to the FAPRI analysis, increasing E15 adoption would raise ethanol use gradually — assuming the average ethanol blend rate rises by about 0.25 percentage points per year. This additional ethanol demand makes it easier for fuel blenders to meet Renewable Fuel Standard (RFS) mandates, lowering compliance costs and reducing prices for Renewable Identification Numbers (RINs).
The model estimates that ethanol use could increase by 264 million gallons in 2026 and by roughly 1.37 billion gallons by 2030 versus baseline assumptions. At the same time, biomass-based diesel demand falls as ethanol fills more of the mandate requirement.
Fuel market implications — cheaper blended fuels, pricier ethanol
The authors note that lower compliance costs could be passed along to consumers, resulting in slightly lower overall fuel expenditures. However, ethanol itself becomes more expensive for buyers as demand rises.
Key modeled effects include:
• Small declines in retail gasoline component costs
• Higher ethanol input prices for blenders
• Lower biodiesel values as biomass-based diesel demand declines
By the end of the projection period, the ethanol-to-gasoline price relationship tightens significantly, potentially reducing blending incentives over time if no additional policy adjustments occur.
Agricultural ripple effects — corn gains, soybean complex pressured
The FAPRI-MU model shows clear cross-commodity impacts. More ethanol production increases corn demand, lifting corn prices modestly. In contrast, weaker biomass-based diesel demand reduces soybean oil use, weighing on soybean prices and crush margins.
Projected market impacts include:
- Corn prices: modestly higher as ethanol demand grows
- Soybean oil: lower prices from reduced biodiesel demand
- Soybean prices: generally softer
- Soybean meal: higher due to reduced crushing activity
The report also suggests government farm program outlays decline slightly under the scenario, mainly because higher corn prices reduce support payments more than soybean declines increase them.
Important caveats from the authors
FAPRI emphasizes that the results assume voluntary E15 expansion without additional policy changes or infrastructure upgrades. If expansion were driven by new mandates, tax incentives, or higher RFS volumes, the outcomes for fuel costs and commodity prices could be materially different.
Bottom Line: The FAPRI-MU analysis suggests E15 expansion could deliver modest consumer fuel savings and reduce compliance costs while redistributing gains and losses across the agricultural sector — supporting corn demand but pressuring soybean-related markets. The findings highlight how biofuel policy changes can create unintended interactions between fuel regulations and farm economics, especially as the U.S. debates year-round E15 access.
Note: Link to an analysis report from the National Corn Growers Association.
NCGA noted much larger implied demand increase.
NCGA states: A 1% blend-rate increase = roughly 1.36 billion gallons ethanol or ~486 million bushels of corn.
Full adoption scenarios suggest:
• ~50% higher corn use for ethanol
• Net increase ≈ 1.4 billion bushels under some assumptions.
NCGA framing: “E15 is a major demand engine for corn growers.”
Key difference: treatment of biodiesel & soybeans. This is one of the biggest contrasts.
FAPRI-MU: More ethanol → easier RFS compliance
• Less need for biomass-based diesel
• Soybean oil prices fall
• Soybean sector pressure increases
In other words: Gains for corn are partly offset by losses elsewhere in ag.
NCGA: The NCGA economic-impact analysis does not emphasize these cross-sector tradeoffs. Focus is on aggregate economic expansion rather than redistribution between crops.
FAPRI looks at relative winners/losers, NCGA highlights total growth.
Fuel price outlook
FAPRI-MU: Slight decrease in overall blended fuel expenditures. BUT ethanol input prices rise as demand increases.
• More nuanced pricing story.
NCGA: Emphasizes consumer savings and economic growth potential from expanded availability.
• Stronger consumer-benefit narrative.
Bottom Line:
FAPRI says: E15 expansion likely helps corn — but the gains are moderate because the biofuel system adjusts internally (lower RINs, less biodiesel, weaker soy complex).
NCGA says: E15 expansion could be transformational for rural economies and corn demand when infrastructure and market adoption fully scale.
Both can be true — they’re just measuring different layers:
FAPRI = market mechanics
NCGA = macroeconomic ripple effects
From a policy and market strategy angle:
• FAPRI is closer to how traders and commodity analysts think — substitution effects matter.
• NCGA is closer to legislative messaging — broader economic narrative aimed at building support for nationwide E15.
In other words: FAPRI describes the “physics” of the system; NCGA describes the “economic promise” if adoption scales.
